Devtools popup throws Uncaught TypeError: undefined is not a function trying to open it as popup/separate window #299
Description
Which project does this relate to?
Router
Describe the bug
Hi 👋,
I’m using Rsbuild with React, TanStack Router, and TanStack Query. Everything works great except the TanStack Devtools popup.
The devtools UI renders, and the popup icon appears, but clicking the popup icon crashes with this error in the console:
Uncaught TypeError: undefined is not a functionin here
import.meta.hot?.on("vite:beforeUpdate", () => {
localStorage.setItem("pip_open", "false");
closePipWindow();
});Your Example Website or App
n/a
Steps to Reproduce the Bug or Issue
- Start a React app using Rsbuild + TanStack Router + TanStack Query.
- Enable the TanStack devtools.
- Open the devtools panel and click the popup icon.
Expected behavior
Popup window should open correctly, as it does when using Vite.
Screenshots or Videos
Screen.Recording.2025-12-27.at.14.44.37.mov
Platform
- Router: [1.131.2]
- OS: [macOS]
- Browser: [Chrome]
- Bundler: [rsbuild]
- Bundler Version: [1.5.4]
Additional context
No response